/**
 * Copyright (C) 2013 DaiKit.com - daikit4gxt module (admin@daikit.com)
 *
 *         Project home : http://code.daikit.com/daikit4gxt
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.daikit.daikit4gxt.client.ui.editor.field;

import com.daikit.daikit4gxt.client.labelprovider.DkAsSimpleStringLabelProvider;
import com.daikit.daikit4gxt.client.ui.cell.DkReadOnlyFieldCell;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.sencha.gxt.data.shared.LabelProvider;
import com.sencha.gxt.widget.core.client.form.Field;
import com.sencha.gxt.widget.core.client.form.ValueBaseField;


/**
 * A Read-Only Text field displaying given value as String using the given {@link LabelProvider} (or a
 * {@link DkAsSimpleStringLabelProvider} if no LabelProvider is provided)
 *
 * @author tcaselli
 * @version $Revision$ Last modifier: $Author$ Last commit: $Date$
 * @param <T>
 */
public class DkReadOnlyField<T> extends ValueBaseField<T>
{

	// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
	// CONSTRUCTORS
	// *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-

	/**
	 * Create a new {@link DkReadOnlyField} with a {@link DkAsSimpleStringLabelProvider}
	 */
	public DkReadOnlyField()
	{
		this(new DkAsSimpleStringLabelProvider<T>());
	}

	/**
	 * Constructor
	 *
	 * @param labelProvider
	 *           the {@link LabelProvider}
	 */
	public DkReadOnlyField(final LabelProvider<T> labelProvider)
	{
		this(null, labelProvider);
	}

	/**
	 * Create a new {@link DkReadOnlyField} with a {@link DkAsSimpleStringLabelProvider}.
	 *
	 * @param linkedValueProvider
	 *           the field provider for the value
	 */
	public DkReadOnlyField(final Field<T> linkedValueProvider)
	{
		this(linkedValueProvider, new DkAsSimpleStringLabelProvider<T>());
	}

	/**
	 * Constructor
	 *
	 * @param linkedValueProvider
	 *           the field provider for the value
	 * @param labelProvider
	 *           the {@link LabelProvider}
	 */
	public DkReadOnlyField(final Field<T> linkedValueProvider, final LabelProvider<T> labelProvider)
	{
		super(new DkReadOnlyFieldCell<T>(labelProvider));
		if (linkedValueProvider != null)
		{
			linkedValueProvider.addValueChangeHandler(new ValueChangeHandler<T>()
			{
				@Override
				public void onValueChange(final ValueChangeEvent<T> event)
				{
					setValue(event.getValue());
				}
			});
		}
	}
}
